User activation: refactor to support WebKit infrastructure

[marcoscaceres]

Test to better support WebKit's infrastructure.

In particular, WebKit doesn't know about:

• domains[www1] and so on, so those are changed to {{hosts[alt][]}} and a different port.
• Some of the tests are missing await.
• Some tests would run before the body was ready.

Reviewed-on: WebKit/WebKit#4841
Reviewed-by: @youennf

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[community-tc-integration]

Uh oh! Looks like an error! Details

Client ID static/taskcluster/github does not have sufficient scopes and is missing the following scopes:

{
  "AnyOf": [
    "queue:rerun-task:taskcluster-github/UQZUIIxFRfCjGKHc-2GbtQ/XSaCoqzQTyqg6VdpKB3aYw",
    "queue:rerun-task-in-project:none",
    {
      "AllOf": [
        "queue:rerun-task",
        "assume:scheduler-id:taskcluster-github/UQZUIIxFRfCjGKHc-2GbtQ"
      ]
    }
  ]
}

This request requires the client to satisfy the following scope expression:

{
  "AnyOf": [
    "queue:rerun-task:taskcluster-github/UQZUIIxFRfCjGKHc-2GbtQ/XSaCoqzQTyqg6VdpKB3aYw",
    "queue:rerun-task-in-project:none",
    {
      "AllOf": [
        "queue:rerun-task",
        "assume:scheduler-id:taskcluster-github/UQZUIIxFRfCjGKHc-2GbtQ"
      ]
    }
  ]
}

---

• method: rerunTask
• errorCode: InsufficientScopes
• statusCode: 403
• time: 2022-11-11T18:10:28.357Z